feat(arm): PubsubSpecifyIdentity

[shoshiGit]

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Description

We converted the check 'PubsubSpecifyIdentity' from TERRAFORM language to the ARM language so that it also works on resources that are defined in the ARM language.

Fixes # (issue)

Description

Ensure Web PubSub uses managed identities to access Azure resources.

Fix

*Converted the check implementation to inspect ARM template resources for Microsoft.SignalRService/webPubSub. Adjusted the check logic to validate the identity/type property against ANY_VALUE, ensuring compliance with managed identity usage. *

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] I have added tests that prove my feature, policy, or fix is effective and works
• [x] New and existing tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules